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Back counter electrode and microphone

A technology of back plate and microphone, applied in the direction of sensors, electrical components, etc., can solve the problem that the signal-to-noise ratio cannot be improved, and achieve the effects of improving the sensitivity, increasing the vibration space, and improving the signal-to-noise ratio.

Active Publication Date: 2013-04-24
SHANDONG GETTOP ACOUSTIC
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0004] In view of this, the present invention provides a backplate and a microphone to solve the problem that the signal-to-noise ratio cannot be improved

Method used

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  • Back counter electrode and microphone

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Embodiment Construction

[0034] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0035] The embodiment of the present invention provides a back plate to solve the problem that the signal-to-noise ratio cannot be improved.

[0036] figure 1 Shown is the distance relationship between the back plate 101 and the diaphragm 103 in the prior art. It can be seen from the figure that the back plate 101 and the diaphragm 103 are parallel, and the distance between them is the thickness of the gasket 102 .

[0037] The inventor found through research...

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Abstract

The invention provides a back counter electrode and a microphone. Due to the facts that an area of the back counter electrode corresponding to an active area of a membrane piece of the microphone forms a protrusion along a direction, far away the membrane piece, of the back counter electrode, and distance between any point of the back counter electrode and the membrane piece is not less than the thickness of a gasket of the microphone, attraction of the back counter electrode to the active area of the membrane piece is enabled to be reduced, vibration space of the membrane piece is increased, thus electric potential of the back counter electrode is enabled to be improved, sensitivity of the microphone is improved, and signal to noise ratio of the microphone is improved.

Description

technical field [0001] The invention relates to the technical field of electret condenser microphones, in particular to a back plate and a microphone. Background technique [0002] A microphone is an electroacoustic device that converts sound waves into electrical signals. A microphone with a higher signal-to-noise ratio indicates that it produces less hum. The larger the signal-to-noise ratio, the smaller the noise mixed in the signal, and the higher the sound quality of the sound playback, otherwise the opposite is true. The signal-to-noise ratio is the ratio of the sensitivity of the microphone to the inherent noise. The methods to improve the signal-to-noise ratio include: improving sensitivity and reducing inherent noise; conventional electret condenser microphones are difficult to reduce inherent noise due to the background noise of circuit components and thermal noise of components; Sensitivity realization; Sensitivity, which means the acoustic-electric conversion ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04R9/02H04R9/08
Inventor 许澎胜
Owner SHANDONG GETTOP ACOUSTIC
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